/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraDataInterfaceRW.h
Set indirect buffer to use, the callback will be inside the RDG pass.
void SetIndirect ( [FRDGBuffer](API\Runtime\RenderCore\FRDGBuffer) * InBuffer, uint32 BufferByteOffset, [FCreateIndirectCallback](API\Plugins\Niagara\FNDIGpuComputeDispatchArgsGenCon-\FCreateIndirectCallback) && Callback ) const